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CVE-2026-92491: firmware: arm_scmi: Roll back partial protocol table registration

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Roll back partial protocol table registration scmi_protocol_table_register() can leave earlier requests registered when a later entry in the same ID table fails. Each request retains a pointer to the driver's ID table, so a failed module load can leave a dangling pointer after the module storage is released. Unrequest only the successfully registered prefix, in reverse order, before returning the failure. Leave the failed entry and the remaining entries untouched because matching requests can be owned by another driver.

Affected products

• Linux: from 6.1.191 before 6.2 — fixed in 6.2

How to fix

Upgrade to a fixed version: Linux 6.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2224b622260ba590ab56ea1585d6bf7610be25b2
• https://git.kernel.org/stable/c/3fa8cabd2d8ed80dd0b818ca7fd410b591392ff6
• https://git.kernel.org/stable/c/456856a34906475fcf4b23879237103770dc7ef2
• https://git.kernel.org/stable/c/826413b858ea2969e4c3e8197d0065efc47c6343
• https://git.kernel.org/stable/c/ee556d118b11c6f5b60a32c1e84f366b336ac7d7

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